From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id DE2926B01BA for ; Wed, 16 Jun 2010 21:51:48 -0400 (EDT) Received: from m4.gw.fujitsu.co.jp ([10.0.50.74]) by fgwmail5.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id o5H1plj2006041 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Thu, 17 Jun 2010 10:51:47 +0900 Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id F003645DE70 for ; Thu, 17 Jun 2010 10:51:46 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id D2C5D45DE6E for ; Thu, 17 Jun 2010 10:51:46 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id B18A01DB803B for ; Thu, 17 Jun 2010 10:51:46 +0900 (JST) Received: from m105.s.css.fujitsu.com (m105.s.css.fujitsu.com [10.249.87.105]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id F24AD1DB803E for ; Thu, 17 Jun 2010 10:51:42 +0900 (JST) From: KOSAKI Motohiro Subject: [PATCH 4/9] oom: oom_kill_process() need to check p is unkillable In-Reply-To: <20100617104311.FB7A.A69D9226@jp.fujitsu.com> References: <20100617104311.FB7A.A69D9226@jp.fujitsu.com> Message-Id: <20100617104647.FB89.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-2022-JP" Content-Transfer-Encoding: 7bit Date: Thu, 17 Jun 2010 10:51:42 +0900 (JST) Sender: owner-linux-mm@kvack.org To: LKML , linux-mm , Andrew Morton , David Rientjes , Minchan Kim , KAMEZAWA Hiroyuki Cc: kosaki.motohiro@jp.fujitsu.com List-ID: When oom_kill_allocating_task is enabled, an argument task of oom_kill_process is not selected by select_bad_process(), It's just out_of_memory() caller task. It mean the task can be unkillable. check it first. Signed-off-by: KOSAKI Motohiro --- mm/oom_kill.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index afcbf17..541a59b 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -687,7 +687,8 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, check_panic_on_oom(constraint, gfp_mask, order); read_lock(&tasklist_lock); - if (sysctl_oom_kill_allocating_task) { + if (sysctl_oom_kill_allocating_task && + !oom_unkillable_task(current, NULL, nodemask)) { /* * oom_kill_process() needs tasklist_lock held. If it returns * non-zero, current could not be killed so we must fallback to -- 1.6.5.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org